NEW: Subscribe to Hacking with Swift+ and accelerate your learning! >>

Referring to the current instance

Inside methods you get a special constant called self, which points to whatever instance of the struct is currently being used. This self value is particularly useful when you create initializers that have the same parameter names as your property.

For example, if you create a Person struct with a name property, then tried to write an initializer that accepted a name parameter, self helps you distinguish between the property and the parameter – self.name refers to the property, whereas name refers to the parameter.

Here’s that in code:

struct Person {
    var name: String

    init(name: String) {
        print("\(name) was born!")
        self.name = name
    }
}
Hacking with Swift is sponsored by Fernando Olivares

SPONSORED Ever ask for help and your reviewer immediately notices issues you missed? Fernando Olivares is a 10-year veteran from Big Nerd Ranch and Lambda School who can help hone your app building skills, and he's just launched a new book that does just that – use the code "hacking" to save $5!

Buy the book

Sponsor Hacking with Swift and reach the world's largest Swift community!

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.4/5

Link copied to your pasteboard.